Tachometer

[Surprman]

You proabably have a tachometer and might not even know it! I found a cool free app for my iPhone called Stobelight by Motionics (I’m not associated with the app). The app allows you to set a strobe frequency on your flash. You simply tweak the Hz/RPM until the progression of a mark on your shaft stops and you have your shaft RPM. It works pretty good. With it I realized my motor pulley on my lathe was too big, resulting in speeds that were higher than spec (SB 9C). I got a new pulley and the spindle speeds at all my belt combinations are good now.

 

[rwm]

That is cool! I got a similar app for my Android called Strobily. It also works well.
Robert

 

[DavidR8]

That is awesome, what great finds @Surprman and @rwm!

 

[Shootymacshootface]

I down loaded the app. I can't wait to try it!

 

[darkzero]

That's pretty cool. Dammit, I just purchased a second optical tachometer a week ago too.

 

[tmenyc]

but I enjoyed using my 200 year old pencil eraser-ed Starret revolution counter!

 

[Shootymacshootface]

I was about to buy an optical tach as well. This just saved me $40.
When I first tried the app it would only read in hertz. I did do a conversion, but that wasn't very much fun. I discovered that you have to change a setting from hertz to rpm's, now it works very well.
Thanks!

 

[rwm]

Also the android app has a coarse and fine RPM adjustment that took me a minute to figure out. You move the slider up and down and then rotate the pointer.
R

 

[DavidR8]

but I enjoyed using my 200 year old pencil eraser-ed Starret revolution counter!

I have one too. Except the eraser part has been well, erased.


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